428072747 has 2 divisors, whose sum is σ = 428072748. Its totient is φ = 428072746.

The previous prime is 428072731. The next prime is 428072809. The reversal of 428072747 is 747270824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428072747 - 2⁴ = 428072731 is a prime.

It is not a weakly prime, because it can be changed into another prime (428074747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214036373 + 214036374.

It is an arithmetic number, because the mean of its divisors is an integer number (214036374).

Almost surely, 2^428072747 is an apocalyptic number.

428072747 is a deficient number, since it is larger than the sum of its proper divisors (1).

428072747 is an equidigital number, since it uses as much as digits as its factorization.

428072747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 175616, while the sum is 41.

The square root of 428072747 is about 20689.9189703585. The cubic root of 428072747 is about 753.6548989819.

It can be divided in two parts, 42807 and 2747, that added together give a palindrome (45554).

The spelling of 428072747 in words is "four hundred twenty-eight million, seventy-two thousand, seven hundred forty-seven".